package org.madao.gulimall.cart.controller;

import org.madao.gulimall.cart.interceptor.CartInterceptor;
import org.madao.gulimall.cart.service.CartService;
import org.madao.gulimall.cart.to.UserInfoTo;
import org.madao.gulimall.cart.vo.CartItemVo;
import org.madao.gulimall.cart.vo.CartVo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.servlet.http.HttpSession;
import java.util.List;
import java.util.concurrent.ExecutionException;

@Controller
public class CartController {

    @Autowired
    CartService cartService;

    @ResponseBody
    @GetMapping("/currentUserCartItems")
    public List<CartItemVo> getCurrentUserCartItems(){
        return cartService.getUserCartItems();
    }

    @GetMapping("/deleteItem")
    public String deleteItem(@RequestParam("skuId")Long skuId){
        cartService.deleteItem(skuId);
        return "redirect:http://cart.gulimall.com/cart.html";
    }

    @GetMapping("/countItem")
    public String countItem(@RequestParam("skuId")Long skuId,@RequestParam("num")Integer num){
        cartService.countItem(skuId,num);
        return "redirect:http://cart.gulimall.com/cart.html";
    }

    @GetMapping("/checkItem")
    public String checkItem(@RequestParam("skuId")Long skuId,@RequestParam("check")Integer check){
        cartService.checkItem(skuId,check);
        return "redirect:http://cart.gulimall.com/cart.html";
    }

    /**
     * 浏览器有一个cookie，user-key；标识用户身份，一个月过期
     * 如果第一次使用jd的购物车功能，都会给一个临时的用户身份
     * 浏览器以后保存，每次访问都会带上这个cookie
     *
     * 登录：session有
     * 没登录：按照cookie里面带来的user-key来做
     * 第一次如果没有临时用户，帮忙创建一个临时用户
     * @return
     */
    @GetMapping("/cart.html")
    public String cartListPage(Model model) throws ExecutionException, InterruptedException {
        //1.快速得到用户信息，id，user-key
//        UserInfoTo userInfoTo = CartInterceptor.threadLocal.get();
//        System.out.println(userInfoTo);

        CartVo cartVo=cartService.getCart();
        model.addAttribute("cart",cartVo);
        return "cartList";
    }

    /**
     * 添加商品到购物车
     *
     * RedirectAttributes ra
     *      ra.addFlashAttribute();将数据放在session里面可以在页面取出，但只能取一次
     *      ra.addAttribute();将数据放在url后面
     * @return
     */
    @GetMapping("/addToCart")
    public String addToCart(@RequestParam("skuId") Long skuId,
                            @RequestParam("num") Integer num,
                            RedirectAttributes redirectAttributes) throws ExecutionException, InterruptedException {
        cartService.addToCart(skuId,num);
        redirectAttributes.addAttribute("skuId",skuId);
        return "redirect:http://cart.gulimall.com/addToCartSuccess.html";
    }

    /**
     * 跳转到成功页
     * @param skuId
     * @param model
     * @return
     */
    @GetMapping("/addToCartSuccess.html")
    public String addToCartSuccessPage(@RequestParam("skuId") Long skuId,
                                       Model model){
        //重定向到成功页面。再次查询购物车数据即可
        CartItemVo cartItem=cartService.getCartItem(skuId);
        model.addAttribute("cartItem",cartItem);
        return "success";
    }
}
